When it comes to diamonds, sunny hues are seducing increasing numbers of jewelry wearers. From yellow diamonds on the auction block to adorning the likes of Marilyn Monroe and Kate Winslet, here’s a look at some weighty sparklers.

The world’s super-rich are turning to rare colored diamonds and other gemstones as a store of wealth and a source of growth. By Leila B. Boulton Diamonds were once a girl’s best friend. Now they’re also an asset class.

Rare colored diamonds are the world’s rarest diamonds and parallel in rarity with the world’s most obscure and nebulous gemstones. Finding a large colored diamond is as easy as the old express “finding a needle in a haystack”. With only 1 in every 10,000 diamond …